Tomography apparatus and method
a tomography and apparatus technology, applied in the field of tomography apparatus and corresponding tomography methods, can solve the problems of longer time taken to produce tomograms, and achieve the effect of fewer processing operations and rapid production of high-resolution tomograms
Active Publication Date: 2019-08-06
UNIV OF LEEDS
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Benefits of technology
This patent describes a new tomography apparatus and methods that can create tomograms with better resolution using fewer measurements and processing operations than previous techniques. The aim is to provide high-resolution tomograms quickly, particularly for flowing samples.
Problems solved by technology
This places high demands on the processing apparatus required, and in general, of course, for a given processing capacity the larger the number of measurements and resultant processing operations to be performed to produce the tomogram, the longer the time taken to produce the tomogram.
Method used
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Embodiment Construction
[0077]Referring now to FIG. 1, this shows tomography apparatus embodying the invention. The apparatus comprises an array of electrodes E1-E16 arranged around the perimeter of a sample-containing volume V. In this embodiment the perimeter is generally circular (for example the electrodes could be arranged around the circumference of a circular sample-containing vessel or conduit, such as a pipe) although in other embodiments the perimeter may have a different shape (for example electrical, square, rectangular, or any other shape). Also in this embodiment, the electrodes are equally spaced around the perimeter, but again, in alternative embodiments, the distribution of electrodes around the perimeter of the sample volume may not be uniform. The apparatus also comprises measurement means 2 (which may, for example, take the form of measurement apparatus, one or more measurement modules, or one or more measurement units). The measurement means is adapted to perform a set of measurements ...
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Abstract
Tomography apparatus comprises: a plurality of electrodes arranged around a perimeter of a cross section of a sample volume for containing a liquid or mixed-phase sample, each electrode being arranged to be in electrical contact with a sample contained in the sample volume; measurement means adapted to perform a set of measurements, each measurement comprising driving a current between a first respective adjacent pair of said electrodes and measuring a voltage developed across a second respective adjacent pair of said electrodes; and processing means adapted to generate a tomogram indicative of sample conductivity over said cross section from said set of measurements. The processing means is arranged to calculate sample conductivity values of a portion of said cross section from said set of measurements and generate said tomogram from said calculated sample conductivity values of said portion using an assumption of symmetry.
Description
RELATED APPLICATIONS[0001]The present application is a National Phase entry of PCT Application No. PCT / GB2015 / 052671, filed Sep. 15, 2015, which claims priority from GB Patent Application No. 1416280.4, filed Sep. 15, 2014, said applications being hereby incorporated by reference herein in their entirety.FIELD OF THE INVENTION[0002]The present invention relates to tomography apparatus and corresponding tomography methods and in particular, although not exclusively, to apparatus and methods for producing tomograms of flowing samples, such as flowing mixtures of fluids, solids, gases, or combinations thereof (i.e. mixed-phase samples).BACKGROUND TO THE INVENTION[0003]A wide variety of tomography apparatus and methods are known, including systems based on electrical impedance tomography (EIT) and electrical resistance tomography (ERT). It is also known to use such apparatus and methods for generating tomograms (e.g. conductivity profiles of cross sections of samples) of substantially s...
Claims
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IPC IPC(8): G01N27/20G01N27/02
CPCG01N27/026
Inventor WANG, MIKARKI, BISHALWANG, QIANG
Owner UNIV OF LEEDS